Boiler



- May 14, 1929. TRASENSTER I 1,712,857

BOILER Filed July 24, 1922 3 Sheets-Sheet 1 May 14, 1929. Is. TRASENSTER BOILER Filed July 24, 1922 3 Sheew-oneet 2 May 14, 1929..

G TRASENSTER 1, 1 ,857

scum 4 Filed Jug 24, 1922 5 Sheets-Sheet .3

0 O O O O O 0 O O O 0 O O 0 O O 0 O O O 0 O O 0' e.. .e e 9 O O O O O O O D O O 0 O O O O O .0 O O O O 0 O O O Mal Patented May 1 4, 1929.

UNITED STATES PATENT OFFICE.

GU STAVE A CORPORATION 013" BELGIUM.

rnnsnnsrnn, or ouunnn, NEAR LIEGE, BELGIUM, essiun'on TO THE socn'itrts ANONYME noeuntsn MARI'HAYE, or occult-cs, N'LEAIt Linen,

nnnern'rr,

BOILER.

Application filed July 24, 1922, Serial No.

The present invention relates to a multitubula-r boiler designed in such a manner as to produce the best coaction between the heated and the heating fluids, by ellfecting the easiest and most rapid circulation Ufl: the two fluids, thereby obtaining a maximum of oi?- liciency. V y

With a View to realizing a lnaxintiuui oil efficiency in the exchange of heat between a heating and a heated fluid, it is, in tact, necessary that these tWo fluids should circulate in opposite directions to each other.

Furthermore, the resistances opoosed, to the course of the two mediums must be as low as possible and the design of the boiler must be such, that the exchange of heat between the two fluids facilitates the circulation.

The arrangement which I prefer tullills these conditions.

The drawiir 5 attached hereto show, by Way of example, a boiler i? this kind.

Figure l is an eirpltmatory drawing};

Figure 2 a side-view oil: the boiler, the iurnace of which is shown in section on line 2-2 of Fig. 23. i t

Figure 3 is a front-view o it some;

lligure 4: is a. horizontal section through. line -l-.-- l oi Fig. 3;

Figure 5 is avertical section through line 53- 5 oi llig. l;

Fig. (l is a 'l'rag inentaiy vertical section showing the construction of one of: the burners, and

Fig. 7 is a similar View showing; another burner.

Let us consider a U-shaped tube (see Fig ure 1), containing Water u p to the level Ali. It We heat the part AC, the density oi the Water contained in this part will (lOLiHlSi, and, in order to find its equilibrium the level ot the water contained in the first arm will rise to DE.

It, now, We allow the Water situated above the level AB of arm AC toflow out through an opening 0, the equilibrium Will be b rolren and Water coming from arm BF will take the place of the Water which escaped. to a consequence of this, if we maintain the Water at a constant level in the arm BF, We shall bring about a circulation of Water in the U-shaped tube, and this circulation will be produced by the difference in the density the Water contained in the two arms oi. the

577,084, and in Belgium March 13, 1922.

U-shapcd tube. lit should be noted that, it We increase the intensity of the source of heat which is used to heat the arm AC, the difference of density of the fluids contained in the two arms will hicrcase, and the circulation of the water will be more active.

With a. View to realizing this principle in practice, the boiler which constitutes the sub ject-nmtter of .38 present invention consists (see l1 igure 22) ot two parts A and B. Each of these parts consists of two cylindrical bod-- ice, 1 and 2 tor part A, and 321ml l for part B, mutually connected by means of av set oi vertical. tubes. The upper part of the cylindrical. body ll is pluccd in communication with the upper part ol the cylindrical. body 1, by means ot a. pipe 5, Whilst the lower part of the cyliinlrical body 3 is placed in com.- munication with the container 2 by means of the pipes (i. flhe container 4; is placed In colonuinieation with the :leedspump by urea us of a pipe 7.

The source of heat is situated at the lower part of the cylindrical body 1. The Utilll'r-IO of the combustion gases will follow the pipes 8 and then rise towards the contaimu 3 through the flue 9. llhence, they will pass through the tubes 10 and escape into the chimney. The part ll oi the boiler will play the part ot a teed-water heater.

The results obtained from ment are theglollmriu 1.2;

((5) A more active production of stoma! in the part which is nearest to the steam outlet, i. a, the steam is separated from the water as soon as it is produced, and the re .wiltllltt. opposed by the Water will be reduced to a In in i in um (7)) The circulation oi? the Water to be vapi'irized is ellieclied with a minimum ot res-iisl'anee. As there are no baflles the cirrulation ot the combustion. gases will also meet with a minimum of resistance.

From the point of View of circulation, I ray also point out that the temperature oi the Water held by tubes 51% and (E dr'lerseoir siderably, being; much higher in the tubes 8 than in the tubes 6. This circumstance tends to cause a flow or? ater from the tubes ('3 towards the tubes 6?, whereby the circulation oi. the Water is facilitated.

(d) in the case of: a stoppage oi? the feedpump, the container 3, which may be oi? a larger diameter than the container 1., may

this arrangeto and B. can'be added to ments.

the stream of hot air I 21 from a heater of any suitable construction.

keep up the feeding for a certain time, through tubes 6 and container 2, oftubes 8, which are not, therefore, liable to be burnt.

(e)v During their whole period of useful course, that is to say, as long as the gases and the Water are in contact, they circulate in opposite directions to each other, the gases circu'lating downwards and the waterupwa-rds.

It should be noted that the tubes 6 are not placed in the course of the heating gases.

Itis obvious that other parts similar the boiler, with a View to increasing the surface in Contact with the hot gases. A'superheater and an air-heater can be inserted in the course of the hot gases.

The combustion of fuels, whether solid or liquid, has been effected hitherto, in the existing types of boilers, with a rather considera. le excessofair for combustion. The device which forms the subject-matter of the present invention allows of a complete combustion being obtained without any excess of air.

With this purpose in View, the boiler is divided, as far as the course of the gases is concerned, into two compartments placed in communication with each other In the first compartment, the solid or liquid pulverized fuel isburnt incompletel by hot air. The gases produced then pass 1nto the second compartment, where they are burnt completely by hot air also. This hot air is supplied from a suitable heater by a pipe 20 (see Fig. 6). The heat produced by the first incomplete combustion is, therefore, utilized completely, and then the gas, cooled by contact with the walls of the boiler, is burnt in its turn, and its combustion heat is also utilized.

' The boiler illustrated consists of two parts A-B each consisting of two containers Nos.

1, 2, 3,4. The containers 1 and2, and 3and 4 are placed mutually in communication by means of vertical tubes 8 and 10. The tubes 8 are, separated into two independent sets by the vertical partition 11 (see Figures 4 and 1 5), which separates the two compartments of the boiler.

The burners 12 and 13 are fitted at the upper part of eachof these two compart- The Water-feed of the boiler is effected by j the bottom container 4; and by a pipe 7.

The pulverized, or liquid, fuel is injected by compressed air through the tube 20 and emerging. from said'tube is commingled'with passing through pipe The fuel is not completely burnt at heater 12, and the hot gases descend through the first compartment 8, heating the tubes therein and are thence conducted up through passage 14 to burner 13, where the gases are completely burned by hot air injected through pipe 22, the gases passing into the second compartment 8 through a nozzle 23.

The hot gases, after having circulated downwards along the tubes 8, rise subsequently through the lines 9 and heat the tubes 10 by circulating in a. downward direction along the same.

The same arrangement could also be applied to existing boilers of any type. In the first boiler, the coal is burnt incompletely; complete combustion takes place afterwards in the second boiler.

The heat emitted by these two combustions respectively can be utilized separately in two different boilers, or in one single boiler, the combustion chamber of which is divided into two parts by a partition. The products of the two combustions always circulate in a downward direction, during their useful course, the gases incompletely burnt in the first boiler or returned in the upper part of the second boiler or of the second compartment.

Having fully described my invention, what I desire to claim and secure by Letters Patentisz- A water tube boiler, comprising a setting divided into a first, second and third compartment, upper and lo er drums in the first and second compartments, a plurality of water tubes connecting said drums and divided into two sets by the partition between said first and second compaifment, burners at the top of the first con'ipartn'ient, a flue conducting the products of combustion from the bottom of the first compartment to the top of the second compartment, burners at the top of said second compartment, a flue conducting the products of combustion from the bottom of the second compartment to the top of said third compartment, upper and lower drums connected by substantially vertical water tubes in said third compartment, said last mentionel upper drum being connected to the first mentioned lower drum by separate tubes, a water supply to the lower drum in the third compartment, and a flue conducting the products of combustion from the bottom of the third compartment.

In testimony whereof I hereunto afiix my signature.

GUSTAVE TRASEN STER.

in the first compartment being 

